keil下12864的显示测试程序，MCU是89C51，同时带有PROteus仿真工程，很好用...

eagle circuit for MP3 expander

Keil C 编程的手写板-Keil C Programming 5270

基于AT89S51单片机和步进电机的国旗升降系统，带语音录放功能。汇编语言编写。-AT89S51-based single-chip stepper motor of the national flag and take-off and landing system, with voice recording function. Compiled languages.

可以设置温度报警上下限。具有输出脉冲脉宽可调节的数字温控仪。-Temperature alarm can be set upper and lower limits. The output pulse width can be adjusted with a digital temperature controller.

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。asm源代码- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Asm source code

The best firmware for int6000 powerline. ClassB-The best firmware for int6000 powerline. ClassB

采用ATMEGA48设计制作低成本高精度的数字温度计，采用C语言设计开发源代码。-ATMEGA48 design using low-cost high-precision digital thermometer, design and development using C language source code.

动力环境监控系统 动力环境监控系统-Dynamic driving force for environmental monitoring system environmental monitoring system

脉冲宽度的测量，利用1602液晶显示，和4*4键盘输入，AT89C52单片机控制，实现对长脉冲宽度的测量-Pulse width measurement, the use of liquid crystal display 1602, and 4* 4 keyboard input, AT89C52 single-chip control, realize the long pulse width measurement

C8051F040的步进电机调试程序，频率计算公式为:(T3时钟频率/(2*val-C8051F040 debugger stepping motor, the frequency of the calculation formula is: (T3 clock frequency/(2* val